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Finding the Fourth Proportional to 138,603.20, 207,930.44 and 43,857.25

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Solution

The fourth proportional to 138,603.20, 207,930.44 and 43,857.25 is: 65,793.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,603.20 : 207,930.44 = 43,857.25 : x
  2. Step 2: Convert to fraction form
    138,603.20/207,930.44 = 43,857.25/x
  3. Step 3: Cross multiply
    138,603.20x = 207,930.44 × 43,857.25
  4. Step 4: Simplify right side
    138,603.20x = 9,119,256,879.51
  5. Step 5: Solve for x
    x = 9,119,256,879.51/138,603.20
  6. Step 6: Final answer
    x = 65,793.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.